698. Network ServicesAvailability of Network ServicesThe network services available will depend on the modelof your phone, the cellular system (AMPS or NAMPS) onwhich it operates, and the services offered by your cellularservice provider.To be able to use any of the network services, you willneed to subscribe to the particular service. The servicemay not be available in all cellular service provider net-works. Please contact your local cellular service providerfor further information.Some services which may be available are listed belowand described briefly in this section:• Calling Line Identification• Call Waiting• Message Waiting• Voicemail• Digital Messaging Service, which includes Short Mes-sage Service and Callback Number Service.Calling Line IdentificationWhen someone calls you, the phonecan display the caller’s phone numberor name (or a text message), withCALLING flashing.If the presentation of the caller’s iden-tity is restricted by the network, or is withheld by the caller,CALL-CALLER ID BLOCKED or CALL-ID NOTAVAILABLE may be displayed instead.